The vanishing bird cage that I won at the recent Potter and Potter auction showed up! The description said they thought it was from the 1930’s, I think it’s a little bit later than than, but it’s really hard to say.
The cage is 5 inches by 4 inches and 4 inches tall and made of brass. That makes this thing HEAVY! When you’re doing the vanishing bird cage, one of the things that you are fighting during the vanish is gravity. The weight of the cage doesn’t help you win that fight!
To put it in perspective, I have another cage of similar construction and dimensions.
The brass cage on the right is 337 grams or almost 3/4 of a pound! The cage on the left is 165 grams, that’s essentially half the weight of the brass cage. The cage on the left also collapses into a thinner profile. I suspect the brass cage was made as a DIY vanishing birdcage, and not something that was mass produced for sale to other magicians.
I’m glad to have added this to my collection, and gotten to compare it to something similar, but half the weight to really confirm my suspicion that weight does matter in a vanishing cage!